Homogenizer OMNI User manual

P/N H258-H
REV. A
OMNI µHb
MICRO HOMOGENIZER
USER MANUAL
™

2
WARRANTY INFORMATION
This manual is a guide for the use of the Omni μHb, Micro Homogenizer
and accessories.
Data herein has been veried and validated. It is believed adequate for
the intended use of the instrument. If the instrument or procedures
are used for purposes over and above the capabilities specied herein,
conrmation of the validity and suitability should be obtained, other-
wise Omni International does not guarantee results and assumes no
obligation or liability. This publication is not a license to operate under,
or a recommendation to infringe upon, any process patents.
Notes, cautions, and warnings within the text of this manual are used
to emphasize important and critical instructions.
This Omni International product is warranted to be free from defects
in material and workmanship for a period of ONE YEAR from the date
of delivery. Omni International will repair or replace and return free
of charge any part which is returned to its factory within said period,
transportation prepaid by user, and which is found upon inspection
to have been defective in materials or workmanship. For the rst 90
days, both parts and service are without charge. For the balance of the
period, parts will be provided but service will be charged at estab-
lished labor rates. This warranty does not include normal wear from
use; it does not apply to any instrument or parts which have been
altered by anyone other than an employee of Omni International nor
to any instrument which has been damaged through accident, neg-
ligence, failure to follow operating instructions, the use of electric
currents or circuits other than those specied on the plate axed to
the instrument, misuse, or abuse. Omni International reserves the right
to change, alter, modify, or improve any of its instruments without any
obligation whatever to make corresponding changes to any instru-
ment previously sold or shipped.
THE FORGOING OBLIGATION IS IN LIEU OF ALL OBLIGATIONS AND LIABILITIES IN-
CLUDING NEGLIGENCE AND ALL WARRANTIES OF MERCHANTABILITY OR OTHERWISE,
EXPRESSED OR IMPLIED IN FACT OR BY LAW, AND STATE OUR ENTIRE AND EXCLUSIVE
LIABILITY AND BUYERS EXCLUSIVE REMEDY FOR ANY CLAIM OF DAMAGES IN CONNEC-
TION WITH THE SALE OR FURNISHING OF GOODS OR PARTS, THEIR DESIGN, SUITABILI-
TY FOR USE, INSTALLATION, OR OPERATION. OMNI INTERNATIONAL WILL IN NO EVENT
BE LIABLE FOR ANY SPECIAL OR CONSEQUENTIAL DAMAGES WHATSOEVER, AND THEIR
LIABILITY UNDER NO CIRCUMSTANCES WILL EXCEED THE CONTRACT PRICE FOR THE
GOODS FOR WHICH LIABILITY IS CLAIMED.

3
IMPORTANT SAFEGAURDS
- READ ALL INSTRUCTIONS BEFORE USING.
- SAVE THIS OWNER’S MANUAL.
The Omni μHb has been engineered for economical functionality as
well as safety; however, basic safety precautions and common sense
must always be demonstrated when using any electrical product.
DO NOT attempt to modify any part of the Omni μHb. If you experi-
ence problems with or have questions about your Omni μHb, contact
your authorized dealer or call Omni International at 800-776-4431
or 770-421-0058.
- DO NOT allow the machine to be submerged in any liquid.
- DO NOT use in any setting other than an indoor laboratory.
- DO NOT plug power cord into an incorrect outlet.
To reduce the risk of burns, electrocution, re, or injury:
- Use this product only for its intended purpose as described in this
booklet. DO NOT use attachments not recommended by the
manufacturer.
- DO NOT operate the product if it is damaged in any way.
- Keep this product away from heated surfaces.
DANGER
WARNING

4
TABLE OF CONTENTS
Warranty Information ....................................................................................... 2
Section 1 — Omni μHb, Micro Homogenizer
1.1 Specications ........................................................................................ 5
1.2 Parts and Accessories ..................................................................... 5-6
1.3 Battery Pack........................................................................................ 6-7
1.4 Battery Pack and Battery Charger Safety Information........ 7-9
1.5 Stand-Mounting the Omni μHb....................................................10
Section 2 — Motor Unit Maintenance
2.1 Motor Drive Unit.................................................................................11
2.2 Motor Bearings ...................................................................................11
2.3 Grounding Instructions....................................................................11
2.4 Storage...................................................................................................12
2.5 Explosion Drawing.............................................................................12
Section 3 — Rotor-Stator Generator Probes
3.1 Installing Rotor-Stator Generator Probes..................................13
3.2 Theory of Operation................................................................... 13-14
3.3 Operation..............................................................................................14
Section 4 — Service
4.1 Assistance .............................................................................................15
4.2 Decontamination...............................................................................15

5
SECTION 1 — Omni μHb, MICRO HOMOGENIZER
The Omni μHb, Micro Homogenizer is a variable speed, handheld,
rechargeable homogenizer. It combines a high-speed, high-torque,
variable-speed motor, interchangeable battery packs, and a choice of
three autoclavable rotor-stator generator probes of various diameters,
7mm Hybrid probe or Omni Tip™ Plastic Probes.
1.1 SPECIFICATIONS
Motor Speed:
Variable settings: 5,000-30,000 rpm
Capacity: 0.03-100 mL
Height (motor only): 14 cm (5.5 in.)
Weight (motor only): 312 g (11oz.)
Electrical Requirements:
Charger: 115V, 60Hz or 220V, 50Hz
Battery Pack: 8.75VDC, 1.6 amp-hr
Motor: 8.75VDC (max)
Standards Approval/Compliance:
115V: CSA Certied
220V: CSA & CE Certied
1.2 PARTS AND ACCESSORIES
Prior to operation, please remove all parts from the shipping container
and inspect for damaged or missing parts. If any parts are found to be
damaged or missing, please contact Omni International at 1-800-776-
4431.
(continued)

6
SECTION 1 — Omni μHb, MICRO HOMOGENIZER (cont.)
1.2 PARTS AND ACCESSORIES (cont.)
The Omni μHb, Micro Homogenizer consists of the following:
Description Part Number Quantity
Motor Drive Unit F2600 1
Battery Pack H1160-B 1
Tool Kit T1001 1
Instruction Manual H258-H 1
Also available, but not supplied with the instrument:
Description Part Number Quantity
Stand Assembly* S1000 1
* The stand assembly includes a base plate, 24” post, cross rod, and post clamp.
Stainless steel generator probes are also available for the Omni μHb,
but are not supplied with the instrument.
Description Part Number
5 mm x 75 mm Stainless Steel Generator Probe B5-75
7 mm x 95 mm Stainless Steel Generator Probe B7-95ST
10 mm x 110 mm Stainless Steel Generator Probe B10-110ST
1.3 BATTERY PACK
The Omni μHb comes with a powerful 8.75 V, 1.6 amp-hour external,
Nickel Cadmium battery pack. Battery life will vary as a function of
load, speed, number of charges, etc. A fully charged battery is generally
capable of 30 minutes of power with a 7 mm generator probe at 25,000
rpm in water. It may be convenient to purchase additional battery
packs (P/N H1160-B) to keep the motor unit operational while battery
packs are recharging.
(continued)

7
SECTION 1 — Omni μHb, MICRO HOMOGENIZER (cont.)
1.3 BATTERY PACK (cont.)
For optimal battery life, the battery should be completely discharged
before recharging. It takes approximately 6 hours to recharge a com-
pletely spent battery pack.
1.4 BATTERY PACK AND BATTERY CHARGER
SAFETY INFORMATION
General Information
• Battery powered equipment is always in the ON position.
Keep the motor unit switch in the OFF position when not in use,
during recharging, or plugging in the unit.
• Keep batteries away from heat or re, they may explode.
• Batteries may leak under extreme use or temperature conditions.
If any liquid comes in contact with skin, wash immediately with
soap and water, and consult a physician. If liquid comes in contact
with eyes, ush them with clean water for a minimum of 10
minutes and seek immediate medical attention.
BATTERY
PACK
CHARGER
GREEN
LIGHT
HOUSING
BATTERY
PACK
BATTERY
RELEASE
TABS

8
SECTION 1 — Omni μHb, MICRO HOMOGENIZER (cont.)
1.4 BATTERY PACK AND BATTERY CHARGER
SAFETY INFORMATION (cont.)
The Battery Charger
• Use only the charger supplied with your Omni μHb.
• Before using the battery charger, read all instructions and caution-
ary markings on the charger and the motor unit.
• DO NOT use an attachment that is not recommended or sold by
the battery charger manufacturer. Such use may result in re, elec-
tric shock, or injury.
• DO NOT operate the charger if it is damaged in any way, such as
receiving a sharp blow or being dropped. Return it to Omni Inter-
national for repair or replacement.
• To reduce the risk of electric shock, unplug the charger from the
outlet before attempting any maintenance or cleaning. Turning o
the controls will not reduce risk.
• DO NOT disassemble the charger, incorrect assembly may result in
re or electric shock. Return it to Omni International when service
or repair is required.
Recharging The Battery Pack
• DO NOT recharge the battery pack in a damp or wet environment.
• Never recharge the unit in an environment where the temperature
is less than +40˚F or more than +140˚F.
• Improperly charging Nickel Cadmium batteries can cause batteries
to explode, causing personal injury.
Cords
• To reduce risk of damage to the electrical plug and the cord, un-
plug the charger or motor unit by the plug rather than by the cord.
• Make sure the charger cord is located so that it will not be stepped
on, tripped over, or otherwise subjected to stress or damage.
(continued)

9
1.4 BATTERY PACK AND BATTERY CHARGER
SAFETY INFORMATION (cont.)
Cords (cont.)
• DO NOT operate the charger with a damaged cord or plug. Have
them replaced immediately.
• An extension cord should not be used unless absolutely necessary.
Use of an extension cord could result in risk of re or electric shock.
If an extension cord must be used, be sure:
• That pins on plug of extension cord are the same num-
ber, size and shape as those of the plug on the charger.
• That the extension cord is properly wired and in good
electrical condition.
• That the wire size is large enough for AC ampere rating
of the charger as specied.
AWG Size of Cord: 18 18 18
Length of Cord (feet): 25 50 100
SECTION 1 — Omni μHb, MICRO HOMOGENIZER (cont.)

10
1.5 STAND-MOUNTING THE OMNI μHb (Optional)
To mount the Omni μHb Micro Homogenizer to the stand assembly,
refer to the gure and follow these steps:
1. Secure the 24” post by twisting it into the base plate
until securely tightened.
2. Loosen the locking knob and slide the post clamp assembly
down over the end of the post until the clamp is at the desired
height and lock in place.
3. Twist the cross rod into the back of the motor housing until tight.
4. Loosen the second knob on the post clamp assembly and
insert the cross rod with motor attached (approximately 1”of
the cross rod should protrude from the back of the post clamp).
5. Lock in place.
SECTION 1 — Omni μHb, MICRO HOMOGENIZER (cont.)
MOTOR
DRIVE
POST CLAMP
ASSEMBLY
LOCKING
KNOB
CROSS
ROD
24” POST
BASE PLATE

11
SECTION 2 — MOTOR MAINTENANCE
2.1 MOTOR DRIVE UNIT
The Motor drive housing should be wiped o after use, especially
when concentrated and potentially damaging liquids are used during
processing. Never use solvents to clean motor unit or power base.
2.2 MOTOR BEARINGS
The Omni μHb Micro Homogenizer motor is equipped with sealed ball
bearings. Under normal use they require no additional lubrication.
WARNING: Keep all housings in place and in working order.
WARNING: Remove all tools from the generator probe before turning
the motor on.
WARNING: DO NOT use the motor in a dangerous environment.
WARNING: Disconnect the motor when changing the generator probe.
2.3 GROUNDING INSTRUCTIONS
In the event of a malfunction or breakdown, grounding provides a
path of least resistance for electric current, reducing the risk of electric
shock. This instrument is equipped with an electric cord and housing
which is double insulated. The unit must be plugged into an outlet that
is properly installed and grounded in accordance with all local cords
and ordinances.
WARNING: DO NOT modify the plug or cord that is provided.
If the plug will not t the outlet, have the proper outlet installed
by a qualied electrician.
WARNING: Reduce the risk of unintentional starting; make sure
the speed switch is in the OFF position before plugging in the motor.
WARNING: Damaged or worn power cords should be repaired or
replaced immediately by a qualied electrician.
WARNING: Improper connection of the equipment can result in a risk
of electric shock.

12
SECTION 2 — MOTOR MAINTENANCE
2.4 STORAGE
The unique design of the Omni μHb allows the handheld unit to stand
vertically on a bench-top or shelf so that it can be stored in less than
six square inches of space.
2.5 EXPLOSION DRAWING
NO. DESCRIPTION ORDER NO.
1 μHb motor F2600
2B-Style Probe Adaptor F3000
3μHb Drive Connect H11513
4* Battery Pack H1160-B
*Part also included as assembly number F2600
1
4
2
3

13
SECTION 3 — ROTOR-STATOR GENERATOR PROBES
3.1 INSTALLING ROTOR-STATOR GENERATOR PROBES
Rotor-stator generator probes are easily installed to the Omni μHb,
Micro Homogenizer motor by means of a quarter-turn bayonet mount.
Simply push the generator probe into the motor housing as far as pos-
sible, turn clockwise, and release. Remove the blue protective cap from
the tip of the generator probe and the Omni μHb is ready to operate.
CAUTION: Replace the blue protective cap on the end of the generator
probe when the generator probe is not being used.
WARNING: The tip of a saw tooth generator probe is sharp.
3.2 THEORY OF OPERATION
The rotor shaft is coupled directly to the drive motor, via the drive pin.
When attached to the homogenizer motor, the rotor shaft can spin up
to 30,000rpm. This assembly makes up the rotor portion of the rotor-sta-
tor generator probe. The tube/collar assembly is attached to the motor
housing, but does not spin. This is the stator portion of the rotor-stator
generator probe. As the rotor knife spins within the tube and collar
assembly, it creates a pumping action, pulling the sample into the open
end of the generator probe and forcing the sample out through the win-
dows in the tube. The interaction of the rotor knife with these windows
sets up a shearing action, reducing the particle size of the sample. The
speed dierential between the rapidly moving portion and the relatively
stationary portion of the sample sets up a second force called cavitation
which pulls the sample apart, further reducing the particle size.
The processing eciency can be aected by:
• Amount of material processed vs. size and speed of the generator probe.
• Container geometry and size (round vessels encourage swirling,
while uted or cornered vessels disrupt ow patters for more eec-
tive mixing/ processing).
• Processing speed vs. optimal speed.
• Size and type of material and ow characteristics (material parti-
cles must be small enough to be carried into the generator head
for optimal processing).

14
SECTION 3 — ROTOR-STATOR GENERATOR PROBES
3.2 THEORY OF OPERATION (cont.)
The upper hole of the tube and collar assembly should be left un-
blocked to allow the sample to circulate through the generator probe.
NOTE: For optimal sample recovery during processing, reduce the
motor speed and completely remove the generator probe from the
sample. Then turn o the motor drive unit.
3.3 OPERATION
Insert the generator probe into the Omni μHb motor and remove the
blue protective cap from the end of the generator probe. The depth of
the generator probe in the sample vessel can signicantly aect ow
patterns within the vessel. This also aects processing eciency. As a
rule of thumb, the generator probe usually operates most eciently
at a depth of 1/3 (to 1/2) of the liquid height. Heavy sediments may
require deeper immersion, and this processing depth can be optimized
by observing ow patterns and related processing results. While pro-
cessing, liquid can circulate through the two holes at the bottom of the
generator probe. The top hole should not be immersed in the sample.
Blocking the upper hole could result in liquid being drawn into the
lower motor bearing.
CAUTION: When using glass-lled Teon lower bearings, do not
operate the unit for extended periods of time without immersing the
bottom of the generator probe in liquid or the sample being processed
in order to avoid premature failure of the lower bearing.
WARNING: Reduce the risk of unintentional starting; make sure that
the variable speed switch is in the OFF position prior to plugging in the
unit.
WARNING: DO NOT process pathogenic material in an open contain-
er, since aerosols created during normal processing could be inhaled
by the operator. Please call for assistance in processing pathogens or
other material which require sealed enclosures.

15
SECTION 4 — SERVICE
4.1 ASSISTANCE
Should this product ever require service, please contact
Omni International at 1–800–776-4431.
4.2 DECONTAMINATION
Should an instrument or component that has been used with radioac-
tive or pathogenic material require factory or eld service, comply with
the following procedure to ensure the safety of service personnel:
• Clean the parts to be serviced of all encrusted material and de-
contaminate them. There must be no radioactivity detectable by
survey equipment.
• Obtain a Decontamination Certicate from Omni International.
Complete the certicate and attach to the instrument or parts
being returned.
If no Decontamination Certicate is attached, and a potential radioac-
tive or biological hazard is detected or suspected by Omni Internation-
al, the equipment will not be serviced until proper decontamination
and certication is complete. The sender will be contacted for instruc-
tions as to the disposition of the equipment. Disposition costs will be
borne by the sender.
WARNING: It is a violation of federal law to transport biologically
hazardous or radioactive materials without proper packaging, labeling,
and appropriate warnings.

www.omni-inc.com
OMNI µHb
MICRO HOMOGENIZER
™
Omni International, Inc.
935C Cobb Place Blvd.
Kennesaw, GA 30144
800.776.4431 
770.421.0058
P/N H258-H REV. A